Compressors, Gas Turbines and Jet Engines The clearance volume of the air compressor is kept minimum because It allows maximum compression to be achieved It permits isothermal compression It greatly affects volumetric efficiency It results in minimum work It allows maximum compression to be achieved It permits isothermal compression It greatly affects volumetric efficiency It results in minimum work ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The overall isothermal efficiency of the compressor is defined as the ratio of Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor Isentropic power to the power required to drive the compressor Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio Volume of free air delivery per stroke to the swept volume of the piston Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor Isentropic power to the power required to drive the compressor Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio Volume of free air delivery per stroke to the swept volume of the piston ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Clearance volume in actual reciprocating compressors is essential To attain high volumetric efficiency To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head To provide cushioning effect To accommodate Valves in the cylinder head To attain high volumetric efficiency To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head To provide cushioning effect To accommodate Valves in the cylinder head ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For a two stage reciprocating compressor, compression from p₁ to p₃ is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p₂ is given by p₂ = p₁. p₃ p₂ = Pa p₃/p₁ p₂ = (p₁ + p₃)/2 P₂ = Pa × p₃/p₁ p₂ = p₁. p₃ p₂ = Pa p₃/p₁ p₂ = (p₁ + p₃)/2 P₂ = Pa × p₃/p₁ ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The type of rotary compressor used in gas turbines, is of Axial flow type Radial flow type None of the listed here Centrifugal type Axial flow type Radial flow type None of the listed here Centrifugal type ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is All of these Pressure drop across the valves Superheating in compressor Clearance volume and leakages All of these Pressure drop across the valves Superheating in compressor Clearance volume and leakages ANSWER DOWNLOAD EXAMIANS APP
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